<<<<<<< HEAD
<!DOCTYPE html>
=======
    <!DOCTYPE html>
>>>>>>> a9217d09e8b4627423a80d7d3e771f869f349cd3
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
<<<<<<< HEAD
    <p id="qaz">内容</p>
    <p id="bdz">内容</p>
    <p id="asd">内容</p>
    <script>
        var obj;
        obj={
            name:'陆俊仡',age:'20',gender:'男'
        }
        document.getElementById("qaz").innerHTML=obj.name
        document.getElementById("bdz").innerHTML=obj.age
        document.getElementById("asd").innerHTML=obj.gender
        var str = 'hellow'
        var num = 123
        var bool = true
        var un = undefined
        var nu = null
        console.log(str,num,bool,un,nu)
    </script>
</body>
</html>s
=======
<script>
    var str;
    str="hellow"
    console.log(str.length)
    console.log(str.charAt(5))
    console.log(str.indexOf('0'))
    console.log(str.lastIndexOf('0'))
    console.log(str.includes('1'))
    var st1 ='abc'
    var st2 ='123'
    console.log(st1.concat(st2))
</script>
    
</body>
</html>
>>>>>>> a9217d09e8b4627423a80d7d3e771f869f349cd3
